Is anyone softwashing tennis courts and/or other exterior acryllic court surfaces.  What concentration seems to work without damaging the surface?  Also a typicall tennis court is 7200 sq ft and was wondering what sq ft price seems right.  is .08/ sq ft coming out to $576/court seem high/low?  Any insight would be appreciated.  I tested at 1% and didnt have any negative affects but it needed many coats and didnt know if anyone found a good compromise.  Thanks!